chore(package): update mocha to version 5.1.0

Closes #230

Author: greenkeeper[bot]

package.json

@@ -37,7 +37,7 @@
     "babel-eslint": "^8.0.0",
     "babel-preset-es2015-node5": "^1.1.2",
     "eslint": "^4.1.0",
-    "mocha": "^4.0.1",
+    "mocha": "^5.1.0",
     "semantic-release": "^11.0.2",
     "sequelize-cli": "^3.0.0",
     "supertest": "^3.0.0",